[FEATURE REQUEST] Sitemap

[GPlay97]

Is your feature request related to a problem? Please describe.
Normally, every shop (actually every website) has a sitemap to be more recognized by google and other search engines.
This is also good to have several pages indexed, that are maybe not directly on the homepage itself.

Describe the solution you'd like
A sitemap.xml is directly generated and extended and updated on every change for product, categories, cms pages.

Describe alternatives you've considered
To have that feature, I need to create custom extension, that queries the API and then do my custom stuff for at least the products, but it would be preferred to have that built in